View the 1's and 0's that make up a file!

Bored and experiencing "programmer's block" with a less trivial project, I've made this little app that prints out the actual 1s and 0s that make up a file you pass as the first command line argument to it

Code:

#include <stdio.h>

int main(int argc, char *argv[])
{
	char buf[1000000];
	int i;
	FILE *fp; 
	short curBit;
	int size;
	
	if(argc!=2)
	{
		printf("Invalid usage");
		return 0;
	}
	fp = fopen(argv[1], "rb");
	if(!fp)
	{
		printf("Could not open %s", argv[1]);
		return 0;
	}
	fread(buf, sizeof(buf), 1, fp);
	
	size = filelength(fileno(fp));
	
	for(i = 0; i < 1000000; i++)
	{
		char temp = buf[i];
		int i2;
		for(i2 = 0; i2 < 8; i2++)
		{
			curBit = ((temp >> 7) & 0x1);
			printf("%d", curBit);
			temp = temp << 1;
		}
		if((size < 1000000) && (i == size))
		{
			break;
		}
		
	}
	return 0;
}